Independent samples t-test

Reference no: EM1312487

Twenty students randomly assigned to an experimental group receive an instructional program; 30 in a control group do not. After 6 months, both groups are tested on their knowledge. The experimental group has a mean of 38 on the test (with an estimated population standard deviation of 3); the control group has a mean of 35 (with an estimated population standard deviation of 5). Using the .05 level, what should the experimenter conclude?

a) Use the steps of hypothesis testing,

b) sketch the distributions involved, and

c) Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.

Reference no: EM1312487

Questions Cloud

Bond issue and interest accrued on bonds due adjustment : Show the journal entries in 2006. (Please be reminded the year-end for ABC Corporate is Dec 31, adjusting is required)

Understanding basics of epidemiology : What is basics of epidemiology, brief description on Understanding basics of epidemiology

Calculation of estimated allowance for doubtful accounts : Calculation of Estimated Allowance for doubtful accounts with a change in Sales - What would you answers be for parts 1 and 2 if sales for the current period were $220,000

Basics of biology : Which of following statements is NOT true about the chemical bonds? Both kinds of the chemical bonds involve electrons in the outer shell. Covalent bonds share the electrons between two atoms.

Independent samples t-test : Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.

Finding the percentage of american debt : If operating lease commitments are considered equivalent to debt, what percentage of the American's debt is represented by the lease liabilities?

Accounts receivable and allowance for doubtful accounts : If $2,000 is determined to be specifically uncollectible, what effect will the write-off of the specific receivable have on: accounts receivable and allowance for doubtful accounts?

What force does a 55 kg passenger exert on the seat : What force does a 55 kg passenger exert on the seat when she is at the top of the Ferris wheel.

What adjustment will have to be made at end of the period : If the allowance for doubtful accounts before any necessary adjustment is at $10,000, what adjustment will have to be made at the end of the period?

User Account

All Pages